Duramaxdiesel and I tried to extract the balance rates and it didnt work with the cts2. They show all 0.0 .
He did pull 2 new codes ive never seen before though, p0016 and another egr p0405 but im deleted so it goes with the other 3 EGR codes.

No clue why it won't show balance rates, even if it was tuned (I don't know if original owner tuned it)